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1.引言加筋板结构在造船、航空和大型机械中已被广泛采用,因而为它的强度计算研究一种简明有效的方法很有必要。以往常采用的有等价交叉梁系法,正交各向异性板法,以及梁系支承法等等。这些方法具有一个共同的缺点:将结构简化成能运用某种方法计算的力学模型,本身的力学根据是比较牵强的。因此,我们认为成功与失效带有很大的偶然性。比如第二种方法只有当加强筋的间距比其矩形板的边长小得很多时,才能得到比较令人满意的结果,间距稍有增大,则误差迅速增大,以致造成错误的结果。因此就存在着这样一个问题,怎样才算“小得很多”?要回答这个问题是没有一定标准的。此外,有的方法的成功与否涉及到附连翼板的有效宽度的选取是否得
1. INTRODUCTION Stiffened plate structures have been widely adopted in shipbuilding, aerospace and large machinery, and it is therefore necessary to study a concise and effective method for its strength calculation. In the past, the commonly used cross beam method, orthotropic plate method, beam support method and so on. These methods have a common disadvantage: they simplify the structure into a mechanical model that can be calculated using a certain method, and their own mechanical basis is relatively far-fetched. Therefore, we believe that success and failure are highly contingent. For example, the second method can only obtain satisfactory results when the spacing of the ribs is much smaller than the length of the side of the rectangular plate. If the spacing is slightly increased, the error increases rapidly, resulting in erroneous results. Therefore, there is such a problem. How do we consider it to be “many small?” There is no certain standard to answer this question. In addition, whether the success of some methods involves the selection of the effective width of the attached wing